package com.hck.ch01.demo;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

public class Demo7 {
    public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
        Class clz = Class.forName("com.com.hck.ch01.demo.Person");
        //获取Person的无参构造：public Person()
        Constructor c1 = clz.getDeclaredConstructor();
        Object obj = c1.newInstance();
        System.out.println(obj);

        //获取Person的单参构造：private Person(String)
        Constructor c2 = clz.getDeclaredConstructor(String.class);
        //Person的单参构造为private，这里已超出其访问范围，不能直接访问
        //通过setAccessable方法，设定可以访问
        c2.setAccessible(true);
        obj = c2.newInstance("new Person");
        System.out.println(obj);

        //获取Person的三参构造：protected Person(String, String, String)
        Constructor c3 = clz.getDeclaredConstructor(String.class,String.class,String.class);
        //Person的三参构造为protected，这里已超出其访问范围，不能直接访问
        //通过setAccessable方法，设定为可以访问
        c3.setAccessible(true);
        obj = c3.newInstance("new Person","beijing","Hello!");
        System.out.println(obj);
    }
}
